Gaya APA

New Standard English Readers for Elementary Schools 4. (sa). Singapore: Children Book.

Gaya Chicago

New Standard English Readers for Elementary Schools 4. . Singapore: Children Book, sa. Buku.

Gaya MLA

New Standard English Readers for Elementary Schools 4. . Singapore: Children Book, sa. Buku.

Gaya Turabian

New Standard English Readers for Elementary Schools 4. Singapore: Children Book, sa. Buku.